Answer
Plan C
Work Step by Step
For Plan A, the cost is:
$$ =45+ 20 \\ =65$$
For Plan B, the cost is:
$$ 30+ (18)(5) \\ = 120$$
For Plan C, the cost is the flat rate of 60 dollars. Thus, Plan C is the best option.
Basic College Mathematics (10th Edition)
by Lial, Margaret L.; Salzman, Stanley A.; Hestwood, Diana L.
Published by
Pearson
ISBN 10:
0134467795
ISBN 13:
978-0-13446-779-5
Chapter 5 - Ratio and Proportion - 5.2 Rates - 5.2 Exercises - Page 346: 41
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